The answer to the question is (C) a lower net income.
Tax withholding refers to a type of tax that is taken from the employee’s wage by the employer for tax payment to the government. It is a type of income tax applied in the United States. There are two types of tax withholding, those that are levied on the people who have residency in the United States and those that are levied on the people who are categorized as nonresidents. Since Carl forgot to account for the tax withholding, the change that would occur in his budget is to his net income, which would be lower.